columnar::TestUtils::IColumnData Node1 columnar::TestUtils ::IColumnData + ~IColumnData() + connect() + clearColumns() + getEntry() + setData() Node2 std::vector< columnar ::TestUtils::IColumnData ::OutputColumnInfo > Node2->Node1 +outputColumns Node3 columnar::TestUtils ::IColumnData::OutputColumnInfo + isOffset + primary + enabled Node3->Node2 +elements Node4 std::string Node4->Node3 +name Node5 std::basic_string< char > Node5->Node4